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Sunspot Numbers

derived from Sunspot Drawings at Kanzelhöhe Observatory

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Start Date
Year Month Day
End Date
Data Selection
Groups north Spots north Groups south Spots south Tiny Groups Total Number Observing Quality North reduced South reduced Total reduced Observer as csv list

The dataset is going back to 1948.
Between 1967 and 1969 there were data gaps due to building activities at the observatory.